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      01-06-2020, 10:01 PM   #1
bimmerboyE92
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Sparco QRT-Rs installed in F80

Finally pulled the trigger and got some race buckets. Car will be heading to Mark McMahan for a 1/2 cage. Waiting until that’s in before installing Schroth 6 points. I’ll update this thread with that stuff in the future. Currently leaning toward completely removing 3 point belt functionality.

I’m trying to get detailed here to help anyone looking into seats and/or mounts in the future. I’ve seen a lot of posts about seats but none had all the info I wanted.

Sparco QRT-R seats
OMP sliders
VAC floor mounts
Sparco 600QRT side mounts

VAC floor mounts installed with the factory torx bolts.

Sparco QRT-Rs almost fit perfectly in the cockpit. The front widest part of the seat is 500mm. A lot of the reason I went with these seats is because most other seats are wider than this. I copied the fore and aft travel of the stock seats. At 75% forward travel (for shorter people), the seat begins to contact the tunnel. I used the bolt holes closest to the tunnel on the VAC floor mounts. The side mount slots are maxed all the way toward the tunnel as well. In fact, the easiest way to install the sliders is outside of the car. Bolt side mounts to seat, mount slider to tunnel side mount and bias the bolt in slot all the way toward tunnel. Tighten that tunnel side slider. Then measure exactly 370mm to the other slider holes and tighten. Slide seat all the way rearward. Set seat on floor adapters and align holes. Install front bolts first (4th bolt hole from the front) and tighten as there is no pressure from the tunnel. Now you can “force” the seat to hit the forward limit of the sliders but it takes more than a push while standing outside the vehicle. If seated, your momentum to slide forward overcomes the carpet compressing. Then bolt down the rear. Slider is mounted in the 11th hole from the back of the floor mounts. I could’ve mounted more rearward but I mimicked the travel of the stock seats.

The passenger side I relieved from tunnel so that the seat only makes contact in the most forward position... but there is no steering wheel to center.

I had to use shorter bolts in the back when mounting the sliders or else they would contact the seat. Use of the rear most slot in the side mount was also needed because of the bolt hitting the seat. I had to use the highest mounting hole in the rear of the side mount to clear. The seat sits pretty close to where the lowest point of the stock seat was. I think it’s perfect for track use with a helmet. Maybe a tad low for me if daily driving.

The worst part about the sliders was the bent handle. The handle is suppose to angle up but hits the seat before unlocking. So I flipped it and facing down the handle is not even a finger thickness off the carpet. So grabbing the handle you have to sorta compress your finger and press down the carpet. Just get sliders with a straight handle if you’re reading this.

I’ll be using VAC lap belt mounts and VAC anti sub mounts. Both items mount to the VAC floor adapter. I know, not legal by most race sanctioning bodies but the best I can do with the interior in place.
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Last edited by bimmerboyE92; 02-23-2020 at 07:36 PM.. Reason: Revised side mounts
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      01-07-2020, 07:04 PM   #2
M2MGM
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Looks good !
Mind if I ask.....how tall are you...and whatís your inseam, waist line and weight ?
Good fit for you ?
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      01-07-2020, 07:10 PM   #3
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I have a middle-age chubby build if you know what I mean. 5’8” 195lbs. 36x32 in jeans. Width wise is good, height wise my shoulders are 1/2” into the shoulder holes. So if you’re taller and weigh a bit more it’s good. But this is for race seat fitment... I wouldn’t daily this thing! My manhood gets kinda squeezed when you first “plop” into the seat and you have to adjust them out of the way if that makes sense.

But I find a Corbeau FX1 (the regular version for up to 38” waist) too big in hips and shoulders. And I also find the Recaro Profi SPG XL too big mostly in hips.
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      01-07-2020, 07:52 PM   #4
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GRT-Rs are a fantastic seat, its essentially a taller Pole Position and allows the harness cutouts to be above the shoulder points on taller drivers.
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      01-08-2020, 06:07 AM   #5
bimmerboyE92
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Got these from EAS during their Black Friday sale. My primary question besides personal body fit was which seats fit into an F80 with a full interior. TOMís answer was the QRT.

The shoulders are 560mm - could probably go with 590mm before contact with the B-pillar.

The issue is the seat base. The QRT-R is 500mm which is one of the smallest out there. And at 500mm is already contacts the trans tunnel. That is gt he critical dimension for anyone shorter than 6ft IMO.
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      01-10-2020, 05:30 PM   #6
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I've got some Circuit QRT seats going on my M4 soon. Thanks for the post as it gives me a good basis!
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      01-10-2020, 06:12 PM   #7
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Looks awesome! Im sure it dropped a lot of weight as well.
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      01-22-2020, 11:38 PM   #8
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Those look amazing. Easily 30lb weight savings I would guess.
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      01-24-2020, 11:14 PM   #9
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Looks great
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      01-25-2020, 06:21 PM   #10
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Quote:
Originally Posted by bimmerboyE92 View Post
Finally pulled the trigger and got some race buckets. Car will be heading to Mark McMahan for a 1/2 cage. Waiting until thatís in before installing Schroth 6 points. Iíll update this thread with that stuff in the future. Currently leaning toward completely removing 3 point belt functionality.

Iím trying to get detailed here to help anyone looking into seats and/or mounts in the future. Iíve seen a lot of posts about seats but none had all the info I wanted.

Sparco QRT-R seats
OMP sliders
VAC floor mounts
VAC side mounts

VAC floor mounts installed with the factory torx bolts.

Sparco QRT-Rs almost fit perfectly in the cockpit. The front widest part of the seat is 500mm. A lot of the reason I went with these seats is because most other seats are wider than this. I copied the fore and aft travel of the stock seats. At 75% forward travel (for shorter people), the seat begins to contact the tunnel. I used the bolt holes closest to the tunnel on the VAC floor mounts. The side mount slots are maxed all the way toward the tunnel as well. In fact, the easiest way to install the sliders is outside of the car. Bolt side mounts to seat, mount slider to tunnel side mount and bias the bolt in slot all the way toward tunnel. Tighten that tunnel side slider. Then measure exactly 370mm to the other slider holes and tighten. Slide seat all the way rearward. Set seat on floor adapters and align holes. Install front bolts first (4th bolt hole from the front) and tighten as there is no pressure from the tunnel. Now you can ďforceĒ the seat to hit the forward limit of the sliders but it takes more than a push while standing outside the vehicle. If seated, your momentum to slide forward overcomes the carpet compressing. Then bolt down the rear. Slider is mounted in the 11th hole from the back of the floor mounts. I couldíve mounted more rearward but I mimicked the travel of the stock seats.

The passenger side I relieved from tunnel so that the seat only makes contact in the most forward position... but there is no steering wheel to center.

I had to use shorter bolts in the back when mounting the sliders or else they would contact the seat. Use of the rear most slot in the side mount was also needed because of the bolt hitting the seat. I had to use the highest mounting hole in the rear of the side mount to clear. The seat sits pretty close to where the lowest point of the stock seat was. I think itís perfect for track use with a helmet. Maybe a tad low for me if daily driving.

The worst part about the sliders was the bent handle. The handle is suppose to angle up but hits the seat before unlocking. So I flipped it and facing down the handle is not even a finger thickness off the carpet. So grabbing the handle you have to sorta compress your finger and press down the carpet. Just get sliders with a straight handle if youíre reading this.

Iíll be using VAC lap belt mounts and VAC anti sub mounts. Both items mount to the VAC floor adapter. I know, not legal by most race sanctioning bodies but the best I can do with the interior in place.
IMHO you don't want to tie yourself to seat with a harness sans a cage - least a half cage - in case of a roll-over.
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      02-23-2020, 07:46 PM   #11
bimmerboyE92
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Decided the VAC mounts were a little too low. Spoke to Sparco and they recommended the QRT-R specific mounts.

Pros
Driver seat is now perfectly centered! The slots were just big enough to push the seat far enough toward the tunnel to center it. Actually 3mm from completely over. The passenger seat is 10mm further away from the tunnel compared to the driver. Seat sits 35mm higher in the rear and 75mm higher in the front vs the VAC mounts. And there is still one more hole to recline if need be.
Round hole in the rear is more robust during a rearward crash

Cons
Steel construction is not as light as the VAC

Also mounted rubber bump stops and VAC lap belt mounts to use with 3 points. I used eye bolts just because I had them from left over from a harness install. Had to put them on top of the floor mounts instead of underneath. Not sure it would really have made a difference but according to NASA (the space people), pull out force is 4000lbs per bolt. I’ll have the cage builder put in proper mounts for the 6 point harness. Used 2016 X5 rear seat belt receptacles. I’ll be using seat belt extenders with the 3 point belt. VAC anti sub was mounted 20 deg behind crotch hole per Schroth instead of VAC’s instructions all the way to the rear of the floor mounts.

Alex @ Alpine coded out the airbags and seat belt receptacles. So I’m assuming that the steering wheel and passenger dash airbags will still function in the event of a crash.
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Last edited by bimmerboyE92; 02-23-2020 at 07:52 PM..
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      02-25-2020, 06:30 AM   #12
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VAC kit looks quality, would be good to see how much lower you could get it with a custom fixed mount for lower COG
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